Received: by 10.180.107.38 with SMTP id gz6mr1440467wib.0.1349579637983;
        Sat, 06 Oct 2012 20:13:57 -0700 (PDT)
Path: q10ni64996673wif.0!nntp.google.com!proxad.net!feeder1-2.proxad.net!usenet-fr.net!de-l.enfer-du-nord.net!feeder1.enfer-du-nord.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path: <ian.g.ke...@gmail.com>
X-Original-To: python-l...@python.org
Delivered-To: python-l...@mail.python.org
X-Spam-Status: OK 0.007
X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'python.': 0.02;
	'subject:Python': 0.05; 'scripts': 0.09; 'python': 0.09; 'msi':
	0.09; 'subject:same': 0.09; 'extension': 0.13; 'file,': 0.15;
	'sat,': 0.15; 'editor,': 0.16; 'oct': 0.16; 'tool.': 0.16;
	'unregister': 0.16; 'variable.': 0.16; 'wrote:': 0.17; 'version.':
	0.17; 'windows': 0.19; 'defined': 0.22; 'installation': 0.23;
	'somebody': 0.23; 'installed': 0.23; 'allows': 0.25; 'header:In-
	Reply-To:1': 0.25; 'wrote': 0.26; 'am,': 0.27; 'message-
	id:@mail.gmail.com': 0.27; "doesn't": 0.28; 'correct': 0.28;
	'run': 0.28; 'environment': 0.29; 'included': 0.29; 'this.': 0.29;
	'received:209.85.215.46': 0.30; 'system,': 0.32; 'file': 0.32;
	'space,': 0.32; 'to:addr:python-list': 0.33; 'version': 0.34;
	'received:google.com': 0.34; 'received:209.85': 0.35; 'but': 0.36;
	'does': 0.37; 'uses': 0.37; 'received:209': 0.37; 'subject:: ':
	0.38; 'mean': 0.38; 'there,': 0.38; 'to:addr:python.org': 0.39;
	'header:Received:5': 0.40; 'your': 0.60; 'different': 0.63;
	'ever': 0.63; 'here': 0.65; 'benefit': 0.70; 'associations': 0.84;
	'console,': 0.84; 'dream.': 0.84; "else's": 0.84; 'isolated':
	0.84; 'to:name:python': 0.84
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
	h=mime-version:in-reply-to:references:from:date:message-id:subject:to
	:content-type; bh=kgRbdlt4X71iGzVgtV4ZWiX6jj7gUAnk0r7Mc4y3oXM=;
	b=m9zR2PkqaLH8IcoTBXD5yFC8WI67W57uFI6Xs846kic2Lq34qxv100Tu5PRZZ35DYP
	8QO3sXaeQp0y1oaNmsJryDTv+jlaOvkh+e1yFN+AiwX+YybInSJ/Aq/SwxBiUynhb2Mi
	YWS7F8eUhDNlESoCb1upsVrgCFY762wv21PlO02wr28PZKEbhEZKmHvtiYO9WSGR+a3C
	A0Rd1Be8TrHjKuWSR4bnelkJtVifwhA8+zH39TgtMEpMMV9565gxIdILz05mlb9baRQj
	f/o/8l3HbfswKyv5lQypdgXQG9BSOAJbQeIabbufvIIpYnnZxCJHHqQ1cM5DQbno9wuQ
	qxag==
MIME-Version: 1.0
In-Reply-To: <314ffb69-c89b-42f6-9af1-61005056ef91@googlegroups.com>
References: <k4a5m9$l2...@dont-email.me>
	<314ffb69-c89b-42f6-9af1-61005056ef91@googlegroups.com>
From: Ian Kelly <ian.g.ke...@gmail.com>
Date: Sat, 6 Oct 2012 21:13:24 -0600
Subject: Re: Coexistence of Python 2.x and 3.x on same OS
To: Python <python-l...@python.org>
X-BeenThere: python-l...@python.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: General discussion list for the Python programming language
	<python-list.python.org>
List-Unsubscribe: <http://mail.python.org/mailman/options/python-list>,
	<mailto:python-list-requ...@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-l...@python.org>
List-Help: <mailto:python-list-requ...@python.org?subject=help>
List-Subscribe: <http://mail.python.org/mailman/listinfo/python-list>,
	<mailto:python-list-requ...@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.1915.1349579637.27098.python-l...@python.org>
Lines: 27
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1349579637 news.xs4all.nl 6929 [2001:888:2000:d::a6]:43969
X-Complaints-To: ab...@xs4all.nl
Content-Type: text/plain; charset=ISO-8859-1

On Sat, Oct 6, 2012 at 1:27 AM,  <wxjmfa...@gmail.com> wrote:
> Using Python on Windows is a dream.
>
> Python uses and needs the system, but the system does
> not use Python.
>
> Every Python version is installed in its own isolated
> space, site-packages included and without any defined
> environment variable. Every Python can be seen as a
> different application.
> Knowing this, it is a no-problem to use the miscellaneous
> versions; can be with the console, with an editor, with
> .bat or .cmd files, with the Windows "start menu" launcher,
> ... like any application.
>
> The file extension is a double sword. Do not use it or
> unregister it, the msi installer allows to do this.
> It is the same task/problem as with any file, .txt, .png, ...
>
> The new Python launcher is a redondant tool.

Yes, because all scripts are only ever run by the person who wrote
them.  The main benefit here is for distribution of Python scripts
with version requirements.  Just because you can rely on your Python
installation to be in C:\Python27 doesn't mean you can rely on
somebody else's installation to be there, or on their file
associations to be configured for the correct version.